<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag>excel模板说明</el-tag>
        <el-tag>
          <i class="el-icon-download" />
          <a :href="BASE_API + '/excel/%E8%AF%BE%E7%A8%8B%E5%88%86%E7%B1%BB%E5%88%97%E8%A1%A8%E6%A8%A1%E6%9D%BF.xls'">点击下载模版</a>
        </el-tag>
      </el-form-item>
      <el-form-item label="选择Excel">
        <el-upload ref="upload"
                   :auto-upload="false"
                   :on-success="fileUploadSuccess"
                   :on-error="fileUploadError"
                   :disabled="importBtnDisabled"
                   :limit="1"
                   :action="BASE_API+'/admin/edu/subject/import'"
                   name="file"
                   accept="application/vnd.ms-excel">
          <el-button slot="trigger"
                     size="small"
                     type="primary">选取文件</el-button>
          <el-button :loading="loading"
                     style="margin-left: 10px;"
                     size="small"
                     type="success"
                     @click="submitUpload">{{ fileUploadBtnText }}</el-button>
        </el-upload>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  data() {
    return {
      BASE_API: process.env.VUE_APP_BASE_API,
      OSS_PATH: process.env.VUE_APP_OSS_PATH,
      fileUploadBtnText: '上传到服务器', // 按钮文字
      importBtnDisabled: false, // 按钮是否禁用,
      loading: false
    }
  },
  methods: {
    submitUpload() {
      this.fileUploadBtnText = '正在上传'
      this.importBtnDisabled = true
      this.loading = true
      this.$refs.upload.submit()
    },
    fileUploadSuccess(response) {
      if (response.success === true) {
        this.fileUploadBtnText = '导入成功'
        this.loading = false
        this.$message({
          type: 'success',
          message: response.message
        })
      }
    },
    fileUploadError(response) {
      this.fileUploadBtnText = '导入失败'
      this.loading = false
      this.$message({
        type: 'error',
        message: '导入失败'
      })
    }
  }

}
</script>

<style>
</style>
